I am simulating a particular waveguide using COMSOL Multiphysics software, for that I have to use the in-direct bandgap property of Silicon in y structure. So, how to assign the in-direct bandgap parameter of the Silicon in COMSOL.
The type of semiconductor can be determined by the 4-probe method or by using the hall effect. The width of the forbidden zone can be determined using a spectrometer, spectrophotometer.